USN-8344-2

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Source
https://ubuntu.com/security/notices/USN-8344-2
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8344-2.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8344-2
Related
Published
2026-05-29T19:53:25Z
Modified
2026-05-29T23:29:14.707811205Z
Summary
python-pip regression
Details

USN-8344-1 fixed vulnerabilities in pip. On Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS the patches for CVE-2025-66471 caused a regression when using pip. The patches for CVE-2025-66471 have been temporarily reverted pending investigation.

We apologize for the inconvenience.

Original advisory details:

It was discovered that pip incorrectly handled TLS certificate verification in session connections. If a session was first used with certificate verification disabled, subsequent requests to the same host would also skip verification regardless of the session's current settings. A remote attacker could possibly use this issue to perform a machine-in-the-middle attack and expose sensitive information. (CVE-2024-35195)

It was discovered that pip's bundled urllib3 library did not limit the number of decompression steps when processing HTTP responses. A remote attacker could possibly use this issue to cause pip to consume excessive resources, leading to a denial of service. (CVE-2025-66418)

It was discovered that pip's bundled urllib3 library improperly handled streaming decompression of highly compressed data. A remote attacker could possibly use this issue to cause pip to consume excessive resources, leading to a denial of service. (CVE-2025-66471)

References

Affected packages

Ubuntu:Pro:22.04:LTS / python-pip

Package

Name
python-pip
Purl
pkg:deb/ubuntu/python-pip?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
22.0.2+dfsg-1ubuntu0.7+esm2

Affected versions

20.*
20.3.4-4
21.*
21.3.1+dfsg-3
22.*
22.0.2+dfsg-1
22.0.2+dfsg-1ubuntu0.1
22.0.2+dfsg-1ubuntu0.2
22.0.2+dfsg-1ubuntu0.3
22.0.2+dfsg-1ubuntu0.4
22.0.2+dfsg-1ubuntu0.5
22.0.2+dfsg-1ubuntu0.6
22.0.2+dfsg-1ubuntu0.7
22.0.2+dfsg-1ubuntu0.7+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "22.0.2+dfsg-1ubuntu0.7+esm2",
            "binary_name": "python3-pip"
        },
        {
            "binary_version": "22.0.2+dfsg-1ubuntu0.7+esm2",
            "binary_name": "python3-pip-whl"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8344-2.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:22.04:LTS",
    "cves": []
}

Ubuntu:Pro:24.04:LTS / python-pip

Package

Name
python-pip
Purl
pkg:deb/ubuntu/python-pip?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
24.0+dfsg-1ubuntu1.3+esm2

Affected versions

23.*
23.2+dfsg-1
23.3+dfsg-1
24.*
24.0+dfsg-1
24.0+dfsg-1ubuntu1
24.0+dfsg-1ubuntu1.1
24.0+dfsg-1ubuntu1.2
24.0+dfsg-1ubuntu1.3
24.0+dfsg-1ubuntu1.3+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "24.0+dfsg-1ubuntu1.3+esm2",
            "binary_name": "python3-pip"
        },
        {
            "binary_version": "24.0+dfsg-1ubuntu1.3+esm2",
            "binary_name": "python3-pip-whl"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8344-2.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:24.04:LTS",
    "cves": []
}

Ubuntu:Pro:26.04:LTS / python-pip

Package

Name
python-pip
Purl
pkg:deb/ubuntu/python-pip?arch=source&distro=esm-apps%2Fresolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
25.1.1+dfsg-1ubuntu2+esm2

Affected versions

25.*
25.1.1+dfsg-1ubuntu2
25.1.1+dfsg-1ubuntu2+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_version": "25.1.1+dfsg-1ubuntu2+esm2",
            "binary_name": "python3-pip"
        },
        {
            "binary_version": "25.1.1+dfsg-1ubuntu2+esm2",
            "binary_name": "python3-pip-whl"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8344-2.json"
cves_map 
{
    "ecosystem": "Ubuntu:Pro:26.04:LTS",
    "cves": []
}